Which three configuration sections are required on service provider PE router to enable IPv4 layer 3 VPN? (Choose three)

Which three configuration sections are required on service provider PE router to enable IPv4 layer 3 VPN? (Choose three)
A . Configure route targets that are used for importing and exporting customer VRF routes.
B . Configure route distinguisher that is used for importing and exporting customer VRF routes.
C . Implement MPLS for all customer-facing links.
D . Configure the VPNv4 address-family under the MP-BGP configuration mode on the PE routers that participate in the customer VRF routing.
E . Configure at least one interface that is assigned to a customer link as a member of the VRF
F . Advertise customer route to all PE router by configure the IPv4 address-family under the MP-BGP configuration mode.

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Answer: A, D, E